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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Water deficit and aluminum tolerance are associated with a high antioxidative enzyme capacity in Indica rice seedlings
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Water deficit and aluminum tolerance are associated with a high antioxidative enzyme capacity in Indica rice seedlings

机译：In稻幼苗的水分亏缺和铝耐受性与高抗氧化酶能力有关

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摘要

Plant growth and productivity are greatly affected due to changes in the environmental conditions. In the present investigation, the interactive effects of two important abiotic stresses, i.e., water deficit and Al toxicity, were examined in the seedlings of two rice (Oryza sativa L.) cvs. Malviya-36(water deficit/Al sensitive) and Vandana (water deficit/Al tolerant). When 15 days grown seedlings were exposed to water deficit (created with 15 % polyethylene glycol 6000) or Al(1 mM AlCl_3) treatment or both the treatments together for 48 h, the lengths of root/shoot, relative water content, and chlorophyll greatly declined in the seedlings of the sensitive cultivar, whereas in the tolerant seedlings, either little or insignificant decline in these parameters was observed due to the treatments. Seedlings subjected to water deficit or Al treatment alone or in combination showed increased intensity of the isoenzyme activity bands of superoxide dismutase (SOD), guaiacol peroxidase (GPX), and ascorbate peroxidase (APX) in in-gel activity staining studies.Water deficit caused decrease in intensity of catalase (CAT) activity bands; however, when seedlings were exposed to AlCl_3 alone or in combination with water deficit, the intensity of the CAT isoforms increased in both the rice cultivars. The level of expression of the activity bands of SOD, CAT, GPX, and APX was always higher in the seedlings of tolerant cv. Vandana compared to the sensitive cv. Malviya-36 under both controls as well as stress treatments. Higher intensity of isozymes representing higher activity levels of antioxidative enzymes in the rice seedlings and their further increase under water deficit, Al exposure, or in combination of both the stresses appears to serve as useful marker for specifying a combination of water deficit and Al tolerance in rice.
机译：由于环境条件的变化，极大地影响了植物的生长和生产力。在本研究中，在两个水稻（Oryza sativa L.）cvs的幼苗中研究了两个重要的非生物胁迫的交互作用，即水分亏缺和Al毒性。 Malviya-36（缺水/铝敏感）和Vandana（缺水/铝耐受）。当生长15天的幼苗暴露于缺水（用15％聚乙二醇6000产生）或Al（1 mM AlCl_3）处理或两种处理共同处理48小时时，根/茎长，相对含水量和叶绿素的长度都大大增加在敏感品种的幼苗中，这些参数下降了，而在耐性幼苗中，由于处理，这些参数几乎没有或没有明显的下降。在凝胶内活性染色研究中，单独或联合使用缺水或铝处理的幼苗显示出超氧化物歧化酶（SOD），愈创木酚过氧化物酶（GPX）和抗坏血酸过氧化物酶（APX）的同工酶活性带强度增加。过氧化氢酶（CAT）活动带强度的降低;然而，当幼苗单独或与水分亏缺一起暴露于AlCl_3时，两种水稻品种中CAT同工型的强度都会增加。耐性cv幼苗中SOD，CAT，GPX和APX活性带的表达水平始终较高。万丹娜相比敏感的简历。 Malviya-36既可进行对照治疗，也可进行压力治疗。较高强度的同工酶代表水稻​​幼苗中较高的抗氧化酶活性水平，并且在水分亏缺，铝暴露或两种胁迫共同作用下其进一步增加，似乎是确定水稻水分亏缺和铝耐性组合的有用标志。白饭。

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